Hi @Holo,
Please, could you describe this issue more in detail? Some screenshots and a sample file are welcome as well, so that we can work to fix it.
This is because you need to load Lands Design before using it (if a plug-in is not loaded, you cannot use it); when you run a Lands Design command, the plug-in loads so you can use it. This is how plug-ins work in Rhino, but maybe you can set it up to load Lands Design automatically at startup: Force Rhino plugin loading at startup